This Glowing Rock Wants to Monitor Your Internet of Things

There’s a smooth, dark brown stone sitting in front of me on the table with a bright circle pulsing on its face—a signal, apparently, about the security status of Yossi Atias’s fictional Internet-connected home.

Atias is the CEO and cofounder of an Israeli startup called Dojo-Labs, one of numerous companies trying to secure the so-called Internet of things. The stone is part of its first security product, Dojo; it gets alerts via low-energy Bluetooth from a white, rectangular device that plugs into your Wi-Fi router and monitors the network activity of Internet-connected home gadgets like smart lights, TV sets, and alarm systems.